Table-2 startsWith endsWith

< CS101

Previously we did tests with == and <. In this short section, add the startsWith/endsWith functions which test which letters are at the start or end of a string.

These tests work very well with the name strings pulled out of the baby data. Here we can look at all the names beginning with "Ab".


table-2-1

For our purposes, strings support a s.startsWith("Ab") function, here testing if the string in the variable s starts with the "Ab" .. true or false. Likewise, there is s.endsWith("yz"), here testing if the string in variable s has "yz" at its very end. (Sadly, these two functions are not part of standard JavaScript; I made them work just for out code because they are so useful. These two functions are common in other computer languages.)

Solution code:

If logic inside the loop:

if (row.getField("name").startsWith("Ab")) {
  print(row);
}
// Change string to "A", "a", "Z", .. each in turn

if (row.getField("name").endsWith("z")) {
  print(row);
}

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